API Exam API-571 Topic 1 Question 109 Discussion

Actual exam question for API's API-571 exam

Question #: 109
Topic #: 1

[All API-571 Questions]

The presence of _________ can destabilize the scale and turn it into a nonprotective scale.

AHS

DHO

Show Suggested Answer

Suggested Answer: D

by Kenny at Apr 03, 2025, 10:43 PM

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Carlene

1 months ago

Ooh, this is a tricky one. I'm torn between C and D, but I'm gonna go with D. HO. Hydroxide seems like it could really do a number on that scale.

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Colette

16 days ago

I agree, both C and D could be potential destabilizers for the scale.

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Miles

1 months ago

I'm leaning towards C. H. It seems like it could also destabilize the scale.

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Geoffrey

1 months ago

I think you might be onto something with D. HO. Hydroxide can definitely mess with the scale.

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Omega

2 months ago

Haha, looks like we're trying to find the right element to mess up the scale. I'll go with A. HS - sulfur always causes trouble!

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Azalee

24 days ago

I'm not sure, but I'll go with C) H just to mix things up.

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Marica

1 months ago

I think oxygen could also be a troublemaker. I'll choose B) O.

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Danica

1 months ago

I agree, sulfur can definitely mess things up. I'll go with A) HS too.

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Rodolfo

2 months ago

But what about H? I think it could also be a potential destabilizer.

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King

2 months ago

Hmm, I'm gonna go with B. O. Oxygen is known to cause issues with protective scales, right?

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Deangelo

18 hours ago

I agree, oxygen is a key player in this scenario.

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Roxanne

3 days ago

Yes, oxygen is a common factor in scale destabilization.

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Adell

8 days ago

I think you're right, oxygen can definitely destabilize protective scales.

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Quinn

10 days ago

D) HO

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Marsha

23 days ago

C) H

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Kasandra

1 months ago

B) O

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Precious

1 months ago

A) HS

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Tegan

2 months ago

C. H seems like the right choice here. Hydrogen can definitely destabilize the scale.

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Jessenia

2 months ago

I disagree, I believe it's O that can turn the scale into a nonprotective one.

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Rodolfo

2 months ago

I think the presence of HS can destabilize the scale.

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Denise

2 months ago

I think the answer is D. HO. It makes the most sense to me.

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Grover

1 months ago

Actually, the correct answer is A) HS. It is the presence of HS that can destabilize the scale.

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Carlota

1 months ago

I think the answer is D. HO. It makes the most sense to me.

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